See also:

Trailer power supply
The trailer power socket of your vehicle is designed for connecting the 7-pin connector supplied as part of the Mercedes-Benzapproved trailer coupling. Depending on your trailer, you may need an ...

Deactivating the HOLD function
The HOLD function is deactivated automatically if:  - you accelerate and the transmission is in position D or R.  - you shift the transmission to position P.  - you apply t ...

Installing the ball coupling
WARNING If the vehicle/trailer combination is not secured, the trailer may come loose. As a result, you could cause an accident. Observe the ball coupling manufacturer's installation inst ...